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Évolution temporelle des précipitations intenses dans la zone méridionale littorale ouest-africaine.

Abstract : The Southern Coastal belt of West Africa (SCWA) is exposed to recurrent flooding. The two objectives of the study are to show the specificity of SCWA to heavy rainfall occurrence and to determine the trends of the latter. Daily rainfall data of 41 stations in the southern parts of Côte d’Ivoire, Ghana, Togo and Benin for the period 1951–2015 and Climate Hazards Group InfraRed Precipitation data were used. The approach is based on the determination (for each station and grid point) of the 95th centile (P95) of precipitations greater than or equal to 1 mm. Results indicate that rainfall is heavier on the coastal belt than inland (average P95 is 65,4 and 45,5 m/day for coastal and inland stations respectively). After a decrease in rainfall totals and the Number of Days of Rainfall above P95 (NJPS95) until the 1970s, the Percentage Rainfall on days of intense precipitation (above P95) compared to the total annual rainfall record is stable.
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Conference papers
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https://hal.archives-ouvertes.fr/hal-01859161
Contributor : Rémi Laffont <>
Submitted on : Tuesday, August 21, 2018 - 5:00:36 PM
Last modification on : Friday, February 14, 2020 - 12:36:04 PM

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  • HAL Id : hal-01859161, version 1

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Marc Kpanou, Patrick Laux, Yao Télesphore Brou, E. Vissin, Pierre Camberlin, et al.. Évolution temporelle des précipitations intenses dans la zone méridionale littorale ouest-africaine.. 31ème Colloque de l'Association Internationale de Climatologie, Jul 2018, Nice, France. pp.116-121. ⟨hal-01859161⟩

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